单项选择题

The scientists have absolute freedom as to what research they think it best to ______.

A．engage
B．devote
C．seek
D．pursue
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单项选择题
Such a change would not ______ to the wishes of the great majority of the people.
A．conform
B．confirm
C．confine
D．confront
单项选择题
Communication is the process of ______ a message from a source to an audience via a channel.
A．transmitting
B．submitting
C．transforming
D．switching
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